\documentclass[11pt,a4paper,oneside,fleqn]{article}

%% Document setup
\usepackage{amsmath}
\usepackage{amsfonts}
\usepackage{amssymb}
\usepackage{graphicx}
\usepackage[top=2cm, bottom=2cm, left=3cm, right=2cm]{geometry}
\usepackage{a4wide}
\usepackage[dutch]{babel}
%\usepackage[T1]{fontenc}
\usepackage{xtab}
\usepackage{amsthm}
\usepackage{url}
\usepackage[latin1]{inputenc}
\usepackage[small,bf,hang]{caption}
\usepackage{fancyhdr}
\usepackage{float}
\usepackage[table]{xcolor}
\usepackage{hyphenat}
\usepackage{lscape}
\usepackage[square,numbers]{natbib}
\usepackage[pdftex]{hyperref}

\pagestyle{fancy}
\fancyhf{}
\renewcommand{\headrulewidth}{0pt}
\fancyhf[HL]{\nouppercase{\textit{\leftmark}}}
\fancyhf[FC]{\thepage}

\setlength{\parindent}{0pt}

% User defined methods
\newcommand{\npar}{\par \vspace{2.3ex plus 0.3ex minus 0.3ex}}
\newcommand{\package}[1]{\texttt{#1}}
\newcommand{\class}[1]{\nohyphens{\texttt{#1}}}
\newcommand{\interface}[1]{\nohyphens{\texttt{#1}}}
\newcommand{\enum}[1]{\nohyphens{\texttt{#1}}}
\newcommand{\method}[1]{\nohyphens{\texttt{#1}}}
\newcommand{\constant}[1]{\nohyphens{\textsc{#1}}}
\newcommand{\degrees}{\ensuremath{^{\circ}} }

\newcommand{\gui}{\textsc{gui} }
\newcommand{\cyclo}{\textsc{cyclo} }
\newcommand{\call}{\textsc{call} }
\newcommand{\nom}{\textsc{nom} }
\newcommand{\noc}{\textsc{noc} }
\newcommand{\nop}{\textsc{nop} }
\newcommand{\loc}{\textsc{loc} }
\newcommand{\ahh}{\textsc{ahh} }
\newcommand{\andc}{\textsc{andc} }
\newcommand{\fout}{\textsc{fout} }

\begin{document}

\input{front_page.tex}

\newpage
\tableofcontents
\newpage
% \input{sections/introduction.tex}

\input{sections/main.tex}
\input{sections/design_decisions.tex}

\renewcommand{\refname}{Referenties} 
\nocite{*}
\end{document}